/* zutil.h -- internal interface and configuration of the compression library
 * Copyright (C) 1995-2012 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

/* WARNING: this file should *not* be used by applications. It is
   part of the implementation of the compression library and is
   subject to change. Applications should only use zlib.h.
 */

/* @(#) $Id$ */

#ifndef ZUTIL_H
#define ZUTIL_H

#ifdef HAVE_HIDDEN
	#define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else
	#define ZLIB_INTERNAL
#endif

#include "zlib.h"

#if defined(STDC) && !defined(Z_SOLO)
	#if !(defined(_WIN32_WCE) && defined(_MSC_VER))
		#include <stddef.h>
	#endif
	#include <string.h>
	#include <stdlib.h>
#endif

#ifdef Z_SOLO
	typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
#endif

#ifndef local
	#define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */

typedef unsigned char  uch;
typedef uch FAR uchf;
typedef unsigned short ush;
typedef ush FAR ushf;
typedef unsigned long  ulg;

extern const char* const z_errmsg[10];  /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */

#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]

#define ERR_RETURN(strm,err) \
  return (strm->msg = (char*)ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */

/* common constants */

#ifndef DEF_WBITS
	#define DEF_WBITS MAX_WBITS
#endif
/* default windowBits for decompression. MAX_WBITS is for compression only */

#if MAX_MEM_LEVEL >= 8
	#define DEF_MEM_LEVEL 8
#else
	#define DEF_MEM_LEVEL  MAX_MEM_LEVEL
#endif
/* default memLevel */

#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES    2
/* The three kinds of block type */

#define MIN_MATCH  3
#define MAX_MATCH  258
/* The minimum and maximum match lengths */

#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */

/* target dependencies */

#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
	#define OS_CODE  0x00
	#ifndef Z_SOLO
		#if defined(__TURBOC__) || defined(__BORLANDC__)
			#if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
				/* Allow compilation with ANSI keywords only enabled */
				void _Cdecl farfree( void* block );
				void* _Cdecl farmalloc( unsigned long nbytes );
			#else
				#include <alloc.h>
			#endif
		#else /* MSC or DJGPP */
			#include <malloc.h>
		#endif
	#endif
#endif

#ifdef AMIGA
	#define OS_CODE  0x01
#endif

#if defined(VAXC) || defined(VMS)
#  define OS_CODE  0x02
#  define F_OPEN(name, mode) \
     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
#endif

#if defined(ATARI) || defined(atarist)
	#define OS_CODE  0x05
#endif

#ifdef OS2
	#define OS_CODE  0x06
	#if defined(M_I86) && !defined(Z_SOLO)
		#include <malloc.h>
	#endif
#endif

// SRS - Apple clang 17 defines target conditionals by default which incorrectly enables ancient code here
#if defined(MACOS) //|| defined(TARGET_OS_MAC)
	#define OS_CODE  0x07
	#ifndef Z_SOLO
		#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
			#include <unix.h> /* for fdopen */
		#else
			#ifndef fdopen
				#define fdopen(fd,mode) NULL /* No fdopen() */
			#endif
		#endif
	#endif
#endif

#ifdef TOPS20
	#define OS_CODE  0x0a
#endif

#ifdef WIN32
	#ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
		#define OS_CODE  0x0b
	#endif
#endif

#ifdef __50SERIES /* Prime/PRIMOS */
	#define OS_CODE  0x0f
#endif

#if defined(_BEOS_) || defined(RISCOS)
	#define fdopen(fd,mode) NULL /* No fdopen() */
#endif

#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
	#if defined(_WIN32_WCE)
		#define fdopen(fd,mode) NULL /* No fdopen() */
		#ifndef _PTRDIFF_T_DEFINED
			typedef int ptrdiff_t;
			#define _PTRDIFF_T_DEFINED
		#endif
	#else
		#define fdopen(fd,type)  _fdopen(fd,type)
	#endif
#endif

#if defined(__BORLANDC__) && !defined(MSDOS)
	#pragma warn -8004
	#pragma warn -8008
	#pragma warn -8066
#endif

/* provide prototypes for these when building zlib without LFS */
#if !defined(_WIN32) && (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
	ZEXTERN uLong ZEXPORT adler32_combine64 OF( ( uLong, uLong, z_off_t ) );
	ZEXTERN uLong ZEXPORT crc32_combine64 OF( ( uLong, uLong, z_off_t ) );
#endif

/* common defaults */

#ifndef OS_CODE
	#define OS_CODE  0x03  /* assume Unix */
#endif

#ifndef F_OPEN
	#define F_OPEN(name, mode) fopen((name), (mode))
#endif

/* functions */

#if defined(pyr) || defined(Z_SOLO)
	#define NO_MEMCPY
#endif
#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
	/* Use our own functions for small and medium model with MSC <= 5.0.
	* You may have to use the same strategy for Borland C (untested).
	* The __SC__ check is for Symantec.
	*/
	#define NO_MEMCPY
#endif
#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
	#define HAVE_MEMCPY
#endif
#ifdef HAVE_MEMCPY
	#ifdef SMALL_MEDIUM /* MSDOS small or medium model */
		#define zmemcpy _fmemcpy
		#define zmemcmp _fmemcmp
		#define zmemzero(dest, len) _fmemset(dest, 0, len)
	#else
		#define zmemcpy memcpy
		#define zmemcmp memcmp
		#define zmemzero(dest, len) memset(dest, 0, len)
	#endif
#else
	void ZLIB_INTERNAL zmemcpy OF( ( Bytef* dest, const Bytef* source, uInt len ) );
	int ZLIB_INTERNAL zmemcmp OF( ( const Bytef* s1, const Bytef* s2, uInt len ) );
	void ZLIB_INTERNAL zmemzero OF( ( Bytef* dest, uInt len ) );
#endif

/* Diagnostic functions */
#ifdef DEBUG
	#include <stdio.h>
	extern int ZLIB_INTERNAL z_verbose;
	extern void ZLIB_INTERNAL z_error OF( ( char* m ) );
	#define Assert(cond,msg) {if(!(cond)) z_error(msg);}
	#define Trace(x) {if (z_verbose>=0) fprintf x ;}
	#define Tracev(x) {if (z_verbose>0) fprintf x ;}
	#define Tracevv(x) {if (z_verbose>1) fprintf x ;}
	#define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
	#define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
#else
	#define Assert(cond,msg)
	#define Trace(x)
	#define Tracev(x)
	#define Tracevv(x)
	#define Tracec(c,x)
	#define Tracecv(c,x)
#endif

#ifndef Z_SOLO
voidpf ZLIB_INTERNAL zcalloc OF( ( voidpf opaque, unsigned items,
								   unsigned size ) );
void ZLIB_INTERNAL zcfree  OF( ( voidpf opaque, voidpf ptr ) );
#endif

#define ZALLOC(strm, items, size) \
           (*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}

/* Reverse the bytes in a 32-bit value */
#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
                    (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))

#endif /* ZUTIL_H */
